[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86/hvm: implement save/restore for posted interrupts
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx] > Sent: Friday, July 25, 2014 2:41 AM > > >>> On 03.07.14 at 17:09, <olaf@xxxxxxxxx> wrote: > > Saving and restoring a PVonHVM guest on a host which has the VMX > > "Posted Interrupt Processing" feature enabled will fail because the > > xen-platform-pci device does not receive interrupts anymore after > > restore. The reason is that the IRQs are not maintained in APIC_IRR, > > but in a separate PIR array. This info is lost during the save > > operation. > > > > Syncing the PIR state into IRR during save, and restoring the state > > later will fix 'xm save/restore' of a PVonHVM guest. > > > > Signed-off-by: Olaf Hering <olaf@xxxxxxxxx> > > Guys, where are we with this? Afaict all simplification suggestions > you provided so far yielded a non-working patch. Are you actively > working on getting a working alternative, or can we get an ack on > what Olaf submitted? > I hope Olaf can figure out why sync_irr_to_pir is actually required before I can ack. Thanks Kevin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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